Buildcraft
Natura
Ore shrubs

https://github.com/OpenCubicChunks/CubicChunks/wiki/Compatibility-for-mc-1.12.2
At the bottom there is already a area for mods not yet tested or that require more testing

Again, this is a place to put recommendations for mods to test. Because, unless the people that work on this github are gods, they aren't capable of looking at every single mod that comes out. This is to help focus them on the mods that are believed to be having issues with Cubic Chunks, allowing them to look into the issue more effectively and improve their mod.

The second table on the compatibility page also does that

then make this the list you draw from.

to put things on that list.

totemic and binnie's mods (Forestry addon)

IndustrialWires-1.6-24
immersivepetroleum-1.12.2-1.1.7
ImmersiveCables-1.12.2-1.2.0.1
Twilight forest
Compact Machines

You do know you can just go on the wiki and add them to the list right away, right? Like everyone else has been doing.

Wasn't aware that was possible.

@Velken @border999

Do any of you know how do I make Custom Cubic as a world-gen in my server.properties?
I mean, what's its name? (For ex, know how in order to generate Biomes O' Plenty world gen you have to write BIOMESOP in the server)

world type CustomCubic instead Default in server config.

Why is this still open if marked invalid?

no clue